19. Operators and expressions

Python's operators are shown here from highest precedence to lowest, with a ruled line separating groups of operators with equal precedence:

Table 6. Python operator precedence

`(E)`	Parenthesized expression or tuple.
`[E, ...]`	List.
`{key:value, ...}`	Dictionary or set.
`...`	Convert to string representation.
`x.attribute`	Attribute reference.
`x[...]`	Subscript or slice; see Section 8.1, “Operations common to all the sequence types”.
`f(...)`	Call function `f`.
`x**y`	`x` to the `y` power.
`-x`	Negation.
`~x`	Bitwise not (one's complement).
`x*y`	Multiplication.
`x/y`, `x//y`	Division. The “`//`” form discards the fraction from the result. For example, “`13.9//5.0`” returns the value `2.0`.
`x%y`	Modulo (remainder of `x`/`y`).
`x+y`	Addition, concatenation.
`x-y`	Subtraction.
`x<<y`	`x` shifted left `y`bits.
`x>>y`	`x` shifted right `y`bits.
`x&y`	Bitwise and.
`x^y`	Bitwise exclusive or.
`x\|y`	Bitwise or.
`x<y`, `x<=y`, `x>y`, `x>=y`, `x!=y`, `x==y`	Comparisons. These operators are all predicates; see Section 19.1, “What is a predicate?”.
`x in y`, `x not in y`	Test for membership.
`x is y`, `x is not y`	Test for identity.
`not x`	Boolean “not.”
`x and y`	Boolean “and.”
`x or y`	Boolean “or.”

Python 2.7 quick reference